Abstract: A classifier wheel (2) for a classifier device (1) for classifying milled comminuted product, in particular of particulate bulk material, is disclosed herein. The classifier wheel (2) includes classifier wheel blades (5), which are arranged in the radially outer region of the classifier wheel (2), and vane surface elements (8), which are arranged radially spaced apart from the classifier wheel blades (5) in the radially inner region of the classifier wheel (2). A method of classifying milled comminuted products and a use of vane surface elements (8) for classifying milled comminuted products are also disclosed.

Abstract: A separator having a separator housing, a separator wheel arranged inside the separator housing and having an axis of rotation (X), and a guide vane assembly arranged in the separator housing, an annular space being provided between the guide vane assembly and the separator housing radially (R) perpendicular to the axis of rotation (X). In order to increase separation performance, a peripheral annular gap is provided in the vertical direction between the guide vane assembly and a cover.

Abstract: A high-efficiency, tandem biaxial dynamic sorting and return powder milling device with automatic baffle regulation, which is used for the sorting of a gas-solid two-phase fluid of an air-powder mixture, is provided. A circle of milling gears for staged milling of return powders is mounted in an annular cavity between an outer conical housing and an inlet pipe; an axial flow airfoil-type vane is fitted on an outer side of a lower part of an inner conical body which is, as a whole, driven into rotation by a variable frequency motor; a movable vane rotor for centrifugal sorting is fixedly fitted on an outer side of a top cone; and the degrees of opening of first-stage baffles and second-stage baffles are respectively controlled and regulated by an automatic baffle regulating mechanism.

Abstract: In order to improve the grinding and classification process, the subsequent dust separation, and to optimize the energy situation of a grinding plant, with the aid of a guiding apparatus and a displacement body, the fine material-fluid low leaving the dynamic classifier part with angular momentum, besides a swirl reduction or swirl elimination, is made uniform in a classifier outlet housing and deflected into a virtually linear flow. The fixed guiding apparatus arranged coaxially with the classifier axis in the classifier outlet housing and the displacement body can be formed as one unit and the guide elements of the guiding apparatus can be arranged on the displacement body and extending into the vicinity of the inner wall of the classifier outlet housing.

Abstract: The invention relates to an apparatus for sifting feedstock, comprising: a. a static sifter that has a ventilated bottom which is oriented at an angle to the vertical and is penetrated by sifting gas; b. an inlet for feeding the feedstock to the ventilated bottom; c. an outlet for the coarse material; d. a dynamic sifter that is mounted downstream and encompasses at least one rotor with rotor blades and a horizontal rotor axis; e. at least one outlet for the sifting gas loaded with fine material; and f. a housing inside which the static and the dynamic sifter are arranged. The housing area surrounding the dynamic sifter is designed as a housing spiral such that the sifting gas flows against the rotor in a substantially tangential direction. The rotor rotates counter to the direction of flow of the sifting gas in the housing spiral.

Abstract: In a cyclone and a method for operating a cyclone, in a duct leading to an inlet of the cyclone, at least partial separation of particles according to size takes place. A bypass arrangement diverts selected particles to the discharge duct of the cyclone. The cyclone is suitable for separating particles from blast furnace waste gases.

Abstract: A static classifier cage is formed in upper and lower tiers of circumferentially spaced bar-shaped vanes of wear-resistant material. The lower tier is formed by and between a bottom ring and an intermediate ring. The top tier is formed by and between the intermediate ring and a topmost ring. In each tier, the lowermost ring is provided with slots to receive and act as a seat for the vertically oriented vanes while the upper ring in the tier is provided with radially outwardly opening notches into which the vanes are moved in a radial fashion. After the vanes are installed, a retainer is fastened into position to prevent the vanes from backing out of the notches.

Abstract: Particle classifier (2) for separating solid particles in a flow of gas and particles (1) into two fractions depending on size by means of gravitation force, air resistance force and applied centripetal force. A mixture of gas and particles is charged well dispersed to a classifier inlet zone (3) from which the mixture is brought into contact with a rotor (6) in a first separation zone (5) having the form of a free rotor chamber. Gas and fine particles are allowed to escape through an upper outlet (9) while the coarse fraction of the particles is forced to pass through a second separation zone and subsequently to leave through a lower outlet (15).

Abstract: An air separator is provided with a rotor positioned above three concentric vessels. The rotor and a plurality of entry ports segregate comminuted material into the three vessels. An exit port from each vessel directs the separated comminuted material for further comminution processes, such as to a ball mill or a roll press, or for use as a final product.

Abstract: An air separator is provided with a rotor positioned above three concentric vessels. The rotor and a plurality of entry ports segregate comminuted material into the three vessels. An exit port from each vessel directs the separated comminuted material for further comminution processes, such as to a ball mill or a roll press, or for use as a final product.

Abstract: The present invention relates to a filter device, especially for a fluidised bed system and particularly for use in the pharmaceutical industry, for separating particles larger than a separating grain from an amount of particles in a fluid flow. The filter device includes a housing and at least one filter portion. A part of the housing is mounted for rotational movement, and the filter portion is provided in the housing, whereby the filter portion is movable upon rotation of the housing. The present invention also relates to a method for separating particles using such a filter device.

Abstract: A classifier for separating coarse particles from a stream of gas and particles discharged from a vertical mill.

Abstract: An article including: disk or vortex ring with a circular opening in the center of the disk; and a fastener adapted to concentrically attach the disk to the particle outlet opening of a classifier wheel.

Abstract: A method of grading comminuted charging material in a wind sifter having a sifting rotor. The sifting air and the charging material are introduced into a sifting chamber and blocking air is blown into a ring seal region in the transition region between the sifting rotor and a stationary withdrawal duct. In order to be able to adjust the grain size distribution range in the fine material/end product in a reliable manner and with relatively little structural outlay, the grain size distribution in the discharged fine material is adjusted in a selective manner with the aid of a bypass stream, which flows in an alterable volume from the sifting chamber into the withdrawal duct and which is charged with sifter charging material or sifter grit, by controlling the supply of blocking air.

Abstract: The present invention relates to a filter device, especially for a fluidized bed system and particularly for use in the pharmaceutical industry, for separating particles larger than a separating grain from an amount of particles in a fluid flow. The filter device includes a housing and at least one filter portion. A part of the housing is mounted for rotational movement, and the filter portion is provided in the housing, whereby the filter portion is movable upon rotation of the housing. The present invention also relates to a method for separating particles using such a filter device.

Abstract: An apparatus for separating coarse particles from a stream of gas entrained with a mixture of coarse and fine particles includes an outer casing, an inner casing disposed within the outer casing and configured to define a passageway between the outer casing and the inner casing through which the stream of gas and mixture of coarse and fine particles can flow substantially upwardly, a plurality of angled vanes for imparting a rotational flow to the stream of gas and particles as the stream passes from the passageway to within the inner casing in order to separate the coarse particles from the fine particles entrained within the stream of gas, a plurality of outlets for discharging the stream of gas and fine particles from the apparatus, and at least one distribution vane pivotably mounted with respect to the outlets for controlling the distribution of fine particles among the various outlets by affecting the rotational flow of the stream of gas and fine particles.

Abstract: In a method for separating material to be separated using a centrifugal air separator, wherein material to be separated and separating gas are charged into the air separator and coarse material and fine material are discharged separately, the separating gas is fed into the centrifugal air separator under superatmospheric pressure, optionally along with the material to be separated. The air separator is maintained at superatmospheric pressure at least in the region of the separator rotor.

Abstract: An apparatus for separating coarse particles from a stream of gas entrained with a mixture of coarse and fine particles includes an outer casing, an inner casing disposed within the outer casing and configured to define a passageway between the outer casing and the inner casing through which the stream of gas and mixture of coarse and fine particles can flow substantially upwardly, a plurality of angled vanes for imparting a rotational flow to the stream of gas and particles as the stream passes from the passageway to within the inner casing in order to separate the coarse particles from the fine particles entrained within the stream of gas, a plurality of outlets for discharging the stream of gas and fine particles from the apparatus, and at least one distribution vane pivotably mounted with respect to the outlets for controlling the distribution of fine particles among the various outlets by affecting the rotational flow of the stream of gas and fine particles.

Abstract: In a separating wheel for an air separator the radially outside ends of the separating wheel blades are tilted backwards in the direction of rotation of the separating wheel. In the area of the radially outside end of the separating wheel blades the front wall of the separating wheel blades which is viewed in the direction of rotation is tilted to the radial direction at a greater angle than the rear blade wall. Very good separating behavior is achieved by the dramatically inclined front wall of the separating wheel blades. The smaller tilt of the rear wall of the separating wheel blades with respect to the radial furthermore prevents the separated material from attaching to the rear wall of the separating wheel blades.

Abstract: This invention relates to an air classifier for the separation of granular material into three fractions, whereby each individual fraction is very precisely separated in a single housing. The classifier incorporates motor-driven separator/classifying wheels each of which is provided with a tangential separating-air supply at the level of the respective wheel, a fixed guide vane ring positioned at a radial distance from the circumference of the respective separating wheel, and at least one bulk-product feeder system as well as discharge provisions for fine, intermediate and coarse material, respectively. The wheels are provided with a closed cover disk at their respective first axial end and with fine and, respectively, medium fraction discharge port at their respective second axial end. The closed cover disks of the wheels form a free-flow gap in the space between the two stages of the classifier.

Abstract: A centrifugal type pneumatic separator having a rotor and a housing. The rotor has a plurality of vanes distributed around a periphery thereof. The housing contains the rotor. The housing has an air input conduit, a material input conduit and an evacuation conduit. The air input conduit passes air through channels formed between adjacent vanes such that air and material flows toward the evacuation conduit. The rotor is divided so as to define at least two separate passages whereby air from the air input conduit flows into the evacuation conduit as two separate and parallel streams.

Abstract: An air separator system for separating particulate material into coarse and fine particles without utilizing water. The inventive device includes a trailer, a support frame pivotally attached to the trailer, a tapering body having an outer wall and an inner wall, a motor secured to the body, a funnel connected to a center tube rotatably attached within the body, and a fan structure attached to the lower portion of the center tube for agitating and blowing upon particulate material that enters the funnel from a feed conveyor. A plurality of upper regular members are pivotally attached within the upper portion of the outer cavity created between the outer wall and the inner wall for adjusting the amount of air flow into the outer cavity. A plurality of lower regulator members are attached within the inner wall for allowing the air to return upwardly toward the fan structure during operation to lift the lighter particulate material.

Abstract: Centrifugal action type pneumatic separator comprising a rotor with a vertical axis provided with vanes regularly distributed over its periphery, guide blades disposed about the rotor and a housing containing the rotor and the guide blades and provided with inputs for the air and for the material to be graded, with an evacuation conduit for the air laden with the fine fraction of the material and with an output for the coarse fraction, with the air penetrating the rotor at its periphery via the channels (15) formed between the vanes, and flowing inside the rotor towards the evacuation conduit.

Abstract: A powder classifier which includes a classifier rotor fixedly secured to a rotatable shaft and having (i) an interior portion defined by upper and lower plates and (ii) an impeller wheel having upper and lower surfaces and a plurality of vanes therethrough. The upper plate has a rounded outer edge along its outer circumference, and the interior portion is in communication with a fine particle discharge outlet. First and second annular rings are concentrically disposed about the outer circumference of the classifier rotor, with the first annular ring being positioned so that a preclassification of a feed powder stream occurs at the first gap such that a fraction of fine particles is separated from the feed stream and flows through the first gap and into the interior portion of the classifier rotor for primary classification, A dispersion disk which rotates independently from the classifier rotor is provided to produce various degrees of dispersion intensities and disperses feed powders prior to classification.

Abstract: A centrifugal type pneumatic separator having a rotor and a housing. The rotor has a plurality of vanes distributed around a periphery thereof. The housing contains the rotor. The housing has an air input conduit, a material input conduit and an evacuation conduit. The air input conduit passes air through channels formed between adjacent vanes such that air and material flows toward the evacuation conduit. The rotor is divided so as to define at least two separate passages whereby air from the air input conduit flows toward the evacuation conduit as two separate and parallel streams.

Abstract: The utilization of an air cyclone classifying method to effectively separate out a low ash fraction, containing less than 11% by weight of non-protein material, from rendered animal meal. A yield of low material greater than 50% by weight is recovered as usable canine and feline food. The method involves the creation in a first cyclone separator of a double vortex air cyclone having a descending external air vortex and a rising internal air spire; wherein an upper chamber therein is equipped with a rotary particle rejector. The rendered animal meal infeed is fed into the rising air spire which entrains and carries the low ash fraction through the rotary particle rejector, to a second cyclone air cleaning device; wherein the low ash material is recovered from the entraining air. The larger and denser high ash particles are recovered from the first cyclone separator.

Abstract: A vertical-axis air classifier having a central product feed, a drive shaft, a tangential classifying air supply inlet located on a level with the rotor, a stationary guide vane ring arranged at a radial distance around the periphery of the rotor, a deflector-wheel rotor with one-sided bearing as well as a housing with fine material and coarse material discharge. The drive shaft, an annular-shaped fines discharge chamber arranged coaxially to the drive shaft, an annular-shaped coarse material discharge chamber arranged coaxially to the drive shaft and the bearing for the rotor are arranged on the same side and beneath the rotor to permit ease of cleaning and dismantling.

Abstract: A chamber has a drive shaft rotatably mounted therein and extending along substantially the entire longitudinal extent of the chamber. This drive shaft is rotatably driven by a motor at a speed of 1,200-10,000 rpm. A plurality of screens having a mesh of 6-10 mesh are spaced from each other along the longitudinal extent of the chamber in opposing relationship and attached to the drive shaft for rotation therewith. Above the screens are a pair of discs which are attached to the shaft for rotation therewith and longitudinally spaced from each other. First and second similar plates having circular apertures formed therein are fixedly attached to the chamber in longitudinally spaced relationship, the first and second discs being positioned in the apertures of said first and second plates respectively. Gas to be purified is fed into the bottom of the chamber and driven upwardly by a compressor fan attached to the drive shaft.

Abstract: A method of separating unburned Carbon, as particulate matter, from the flyash produced as a result of the combustion process occurring in a pulverized-coal fired steam generating power plant is disclosed. More particularly the invention separates the flyash into a coarse product group and a fine product group by utilizing the differences in specific gravity between the Carbon particles and remaining flyash as well as utilization of the dynamic classification characteristics of a rotary classifier to effect the separation whereby at least one of the two product groups comprises a relatively low weight percentage of unburned Carbon while yet comprising a relatively high percentage of the total mass of product recovered after separation.

Abstract: An improved vane of the type adapted for use in the classifier cage of a bowl mill type coal pulverizer. The improved vane is designed such that its lower end extends below the classifier cage inlet when the vane is mounted in the inlet. In a preferred form, the vane has a generally trapezoidal shape with a longer lower edge. The vane is additionally bent or curved over a major portion to direct coal tangentially toward the surface of the classifier cone.

Abstract: A separator wheel for an air separator, through which separation air loaded with fine material flows through the separator wheel from the outside to the inside and in which the separation air loaded with fine material is discharged in an axial direction from separator wheel, includes at its periphery channels in axially different radial planes with different angles to the radial direction of the separator wheel, the angle of incline of the channels near an outflow end of the separator wheel being greater than the angle of incline of channels away from outflow end.

Abstract: The invention relates to a grader which employs an air separation principle. The grader includes a rotor rotatably supported in a housing. The rotor includes a pair of rotor disks on its outer boundaries extending radially substantially to the housing. A plurality of blades are disposed on the rotor between the rotor disks. A circumferential channel is formed by the rotor disks, the housing and the plurality of blades. The bladed rotor functions as a vertical sink in order to grade a solid which is fed into the circumferential channel via a tangential passage.

Abstract: A classifying device including an upper, dispersing chamber for dispersing solid particles supplied thereto together with a carrier gas, and a lower, classifying chamber directly connected to a lower end of the dispersing chamber for centrifugally classifying the solid particles, supplied from the dispersing chamber to the classifying chamber, into relatively fine particles and relatively coarse particles. The dispersing chamber is provided with a rotor for swirling the solid particles in the dispersing chamber.

Abstract: Apparatus of theforced air vortex type for classification of particulate material into a fine portion and a coarse portion, the apparatus comprising a truncated cone shaped upper section (101) comprising a separating wheel (111) rotating about a substantially vertical axis, a vertically arranged inlet pipe (106) for supplying a particulate material dispersed in an air flow, a conical feed distributor (107) having a tip end directed downwards and arranged concentrically with the inlet pipe (106) and the separating wheel, and a spiral shaped outlet (102) for removal of classified fine material dispersed in air, and a substantially truncated cone shaped lower section (103), the upper section of which exhibiting a secondary air inlet (105) arranged tangential to the circumference of the lower housing (103) to supply secondary air in a direction concurrently with the direction of rotation of the separating wheel (111) and a second outlet (104) for classified coarse particulate material.

Abstract: A dynamic classifier for a coal pulverizer has an improved drive mechanism which is mounted on top of a pulverizer and concentric with the classifier axis of rotation and is directly controllable. The drive mechanism is a variable-speed DC or AC electric motor having a hollow motor shaft. The motor can produce classifier rotor rotational speeds of between 50 and 200 rpm. The classifier rotor is supported from the hollow motor shaft. A coal feed pipe passes through the hollow motor shaft and classifier rotor shaft into the pulverizer.

Abstract: An improved classifier cage for bowl mill type coal pulverizers which have been converted from stationary throats to rotating throats with reversed flow direction. The direction of the classifier vanes is reversed such that the rotational flow direction of coal/air from the rotating throat is generally maintained as it passes through the classifier cage into a classifier cone, rather than being reversed in "U-turn" fashion. A further improvement is made in the geometry of the classifier vanes to create a better downward and tangential redirection of the flow into the classifier cone.

Abstract: The invention relates to a centrifugal force separator whose rotor shaft protrudes at at least one of the two axial ends through a chamber for the discharge of the fines and the air. Particularly, the invention relates to the problem, in a centrifugal force separator with bilateral aspiration of fines and air, of reducing the distance between the bearings of the rotor shaft, while at the same time achieving an optimum between the requirement for unhampered outlet of the fines and the separating air, on the one hand, and, on the other hand, the requirement of a short distance between the bearings and, therefore, a short, light rotor shaft. According to the invention, each outlet chamber 17,18 provides an extension 19,20 or boss reaching inward axially, in which a bearing 21,22, for the rotor shaft is contained.

Abstract: A separator for sorting of particulate material suspended in a conveying gas into a fine fraction and a coarse fraction, which separator comprises a rotor with a shaft, a housing, which encases the rotor and has an inlet for the material/gas suspension and outlets for fine and coarse fractions, respectively. Regulating means are associated with the shaft for adjusting the axial position of the shaft, and hence of the rotor, relative to the housing, thereby adjusting the amount of unseparated material that bypasses the rotor and passes directly to the fine fraction outlet.

Abstract: A plate-type fluid separator is used to separate a plurality of mutually immiscible components from a mixed fluid stream thereof. The separator contains at least one separator flow plate which has formed on a common facial surface thereof at least one separation chamber. Each separation chamber contains at least one inlet means; a channel assembly in fluid communication with the inlet means and composed of a main flow channel split at a downstream end thereof into a plurality of branching flow channels; and a plurality of outlet means in fluid communication with the branching flow channels. The main flow channel separates the stream passing therethrough into a plurality of substantially discrete fluid phases having different average density or viscosity values. Each branching flow channel receives a discrete phase and passes such phase to the outlet means.

Abstract: A method of separating two or more immiscible components from a multicomponent fluid stream thereof involves passing the stream through one or more separation chambers of a plate-type separator. The separator contains at least one separator flow plate, each of which has formed on a common facial surface thereof at least one separation chamber containing at least one inlet means, a channel assembly in fluid communication with the inlet means, and a plurality of outlet means. The channel assembly contains at least one branched-channel structure composed of a main flow channel split at a downstream branch-point end thereof into at least two branching flow channels. The main flow channel is adapted to separate the multicomponent stream passing therethrough into a plurality of substantially discrete density-differing or viscosity-differing fluid phases. Each of the branching flow channels is adapted to receive one of the discrete phases.

Abstract: Precise classifying of granular or powdered raw material at the desired classifying point by means of a vortex pneumatic classifier comprising: a rotor, a plurality of vortex flow adjusting vanes provided on the said rotor, a classifying chamber defined around the said vortex flow adjusting vanes, and guide vanes radially opposing the said vortex flow adjusting vanes across the said classifying chamber, wherein the mounting pitch P of the said vortex flow adjusting vanes is determined in relation to the classifying particle diameter Dp(th) so as to meet the condition of the following relation expressionP.ltoreq.1.04.times.Dp(th).sup.0.365.

Abstract: A pneumatic sifter includes a feeder for supplying sift material, optionally with sifting air, to a rotationally symmetrical sifting chamber which surrounds a centrally disposed air outlet chamber, and a coarse particle discharge. In order to keep the flow resistance low as air enters into the air outlet chamber, guide vanes are provided in the air outlet chamber, which are spaced from each other at uniform angular distances and extend approximately over the axial extension of the sifting chamber.

Abstract: Improvements are disclosed in apparatus for air classifying mineral particles by size. The apparatus is of the type including a vertically oriented flow channel for carrying an upwardly directed air flow stream in which the particles are dispersed and a cylindrical air classifier mounted in the flow channel. The classifier has a cage which is rotatable about a vertical axis and is laterally open to the flow channel. A plurality of spaced vertical rejector blades are mounted about the lateral periphery, and the cage is closed at its lower end by a support plate. An outlet is connected to the classifier interior for withdrawing particles passing radially through the blades for collection; and air drawing device is connected to the outlet for drawing the air stream and particles into the classifier and establishing an upward flow of air and dispersed particles within channel.